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1、第13卷第3期地学前缘(中国地质大学(北京);北京大学)Vol.13No.32006年5月EarthScienceFrontiers(ChinaUniversityofGeosciences,Beijing;PekingUniversity)May2006沉积岩型铅锌矿床的成矿系统研究1,21,21,23杨永强,翟裕生,侯玉树,吕志成1.中国地质大学地质过程与成矿作用国家重点实验室,北京1000832.中国地质大学岩石圈构造、深部过程及探测技术教育部深部成矿实验室,北京1000833.中国地质调查局发展研究中心,北京1
2、00037YANGYong-qiang,ZHAIYu-sheng,HOUYu-shu,LÜZhi-cheng1.StateKeyLaboratoryofGeologicalProcessesandMineralResource,ChinaUniversityofGeosciences,Beijing100083,China2.KeyLaboratoryofLithosphereTectonicsandLithoprobingTechnologyofMinistryofEducation,ChinaUniversityo
3、fGeosciences,Beijing100083,China3.DevelopmentResearchCenterofChinaGeologicalSurvey,Beijing100037,ChinaYANGYong-qiang,ZHAIYu-sheng,HOUYu-shu,etal.Studyofmetallogenicsystemsofsediment-hostedleadandzincdepos-its.EarthScienceFrontiers,2006,13(3):200-205Abstract:Sedi
4、ment-hostedleadandzincdepositsareeconomicallyimportanttypesoforedeposits.Theseoredepositsaretypicallylocatedattheedgeofstablecontinentcratons.Thestudyofsediment-hostedleadandzincmetallogenicsystemfocusesontherelationshipbetweentime-spaceandore-formingevents.Inou
5、rstudy,weexaminedthelinksinthesequenceofeventsthatleadfromore-formingstages,tooreemplacementandpreservation.Thismethodcanfindouttheoredistribution,oresuppliers,genesis,ore-formingmechanism,andguidethescientificore-searching.Sediment-hostedleadandzincdepositcanbe
6、dividedintothreetypes:1)SedimentaryExhalative(SEDEX),2)Mississippe-Valleytype(MVT)and3)Sandstone-hostedtype(SST).Inourstudyofthethreetypesofsediment-hostedmetallogenicsystems,wecametothefollowingconclusions:(1)InthecaseofSSTdeposits,porosityandpermeabilityoftheh
7、ostsandstonearethemostimportantorecontrols.Forexample,theJindingPb-Zndepositisonlycontrolledmainlybystructureandthehighlyporouscharacterofthehostrockratherthanthesedimentarystrataperse.(2)TheHuizheZn-PbMVTdeposit,theoremetalswereprecipitatedfromhotsalinefluidsas
8、sociatedwithvolcanicsystems.Thegenesisisepigenesisofmixingsolutionore-formingprocess.(3)SEDEXPb-Zndeposits,arespatiallyassociatedwithsyngeneticfaultswhichprovidedthep
